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8th Grade Science - Physics Review (Energy & Newton's Laws) Flashcards | StudBud
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8th Grade Science - Physics Review (Energy & Newton's Laws)
8th Grade Science - Physics Review (Energy & Newton's Laws)
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Review Quiz for Energy Types and Newton's Laws #crms #8th #science #force #motion #physics
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Questions
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Answers
1
The following image is best described as an example of what kind of energy transformation?
Gravitational to Kinetic
Chemical to thermal
Radiant to Chemical
Electric to sound
2
Newton's 1st Law states, "An object at rest will stay at rest unless acted on by an ___ force."
balanced
internal
external
unbalanced
3
Which of following forces does not take part in determining how far a baseball will fly?
Unbalanced force of the bat
The radiant energy coming from the stadium lights
Friction
Gravity
4
At which point on the tracks does the roller coaster have the greatest kinetic energy?
C
D
B
A
5
Newton's 2nd Law is the equation: Force = _________ x Acceleration
Height
Mass
Weight
Speed
6
What is the Net Force for the following situation?
0 N
1 N
10 N
25 N
7
Which of the following is a force that opposes motion?
Friction
Balanced
Yoda
Inertia
8
How does a single pulley system make work feel easier?
Increasing the force applied
Decreasing the amount of work done
Decreasing the force
Changing the direction of the force
9
A person's body flying forward when a car's brakes are slammed on is an example of...
Potential Energy
Friction
Humor
Inertia
10
A large ball has a mass of 5kg and is pushed with a force of 20N. What is the acceleration?
4 m/s2
5 m/s2
25 m/s2
15 m/s2
11
Which of the following is NOT an example of Newton's 3rd Law at work
Using your foot to push you on a skateboard
Pushing harder to move an object faster
Jumping on a trampoline
A rocket launching into space
12
If you wanted to increase the force required to move a box, what is one thing you could do?
Put grease along the surface you're moving the box
Fill the box with books
Have a smaller person push the box
Cut the bottom out of the box
13
Which of the following would have the most kinetic energy?
A train moving 120 mph
A race car moving 180 mph
A paintball flying out of a gun
A bowling ball thrown down the lane
14
An object's tendency to resist a change in motion is called ____________.
force
inertia
acceleration
bad manners
15
A brick with a mass of 5 kg hits the ground going 15 m/s
2
. With how much force does it hit?
10 N
20 N
75 N
3 N
16
Which of these is NOT one way to increase the potential energy of a rock at the top of cliff?
Decrease its mass
Increase its mass
Raise it even higher
17
Which of the following would be an example of a chemical to electrical energy transformation?
A battery in a flashlight
A baseball being thrown
A microwave oven
Wood being lit on fire
18
If you rolled a ball across a field and there were NO FRICTION, what would happen to the ball?
It would stop rolling
It would increase in speed
It would maintain the same speed
It would decrease in speed
19
At which point is Kinetic Energy the greatest?
4
1
3
2
20
What type of force causes an object to experience a change in motion (accelerate)?
Balanced
Equal
Unbalanced
Zero
21
How long does it take a car to travel 400 miles at a speed of 50 miles per hour?
8 hours
450 hours
0.125 hours
350 hours
22
Which of the following would have the most potential energy?
A ping pong ball 7 feet off the ground
A small marble 3 feet off the ground
A bowling ball 5 feet off the ground
A cotton ball 30 feet off the ground
23
______________ is defined as the ability to do work.
Force
Kinetics
Energy
Physics
24
At which point is Potential Energy the greatest
2
1
4
3
25
What kind of motion is the object in this graph experiencing?
Constant speed
No motion
Constant acceleration
Constant deceleration
26
Where on the roller coaster is potential energy being converted to kinetic energy?
A to B
C to D
Both A to B & B to C
B to C
27
What type of motion is the object experiencing between points B and C?
Constant speed
Constant acceleration
Deceleration
No motion
28
If you're riding a skateboard and hit a big pile of sand, what will your body do?
Continue forward at the same speed due to inertia
Fly backwards due to Newton's 3rd Law
Stop immediately with the skateboard
Go straight to the ground due to gravity
29
Newton's 3rd Law states, "For every action there is an equal and _________ reaction."
misdirected
complete
terminal
opposite
30
If some boys riding down a hill on bikes want to increase the force with which they hit a ramp
they shouldn't pedal as hard.
they should have a friend get on the bike with them.
they should start closer to the ramp.
they should yell really loud when they hit the ramp.
31
When doing push-ups, if you push down with a force of 50N, what force is exerted back on you?
50 N
0 N
-50 N
10 N
